This practice is a guide for removing test specimens from
existing built-up roofing systems in the field and for determining
the approximate quantities of the components of that
specimen (Note 1). Components determined may be:

Insulation components when they are part of the roof membrane
system,

Plies of roofing felt,

Interply layers of bituminous material,

Top coating, and

Surfacing.

NOTE 1—This procedure is for the investigation of existing roofs
and is not intended for new construction inspection.

This practice is applicable to both 914-mm (36-in.) and 1000-mm
(39 3/8-in.) wide felt rolls.

The values stated in SI (metric) units are to be regarded as
standard.

This standard does not purport to address all of the safety
concerns, if any, associated with its use. It is the responsibility
of the user this standard to establish appropriate safety and
health practices and determine the applicability of regulatory
limitations prior to use. For specific precautionary
information, see 6.3.2.1.